Chemistry
A brown substance A on heating in air turns black forming another substance B. Substances A and B are:
- A = Fe and B = FeO
- A = Zn and B = ZnO
- A = Cu and B = CuO
- A = Pb and B = PbO
Related Questions
Burning of a metal is an example of :
- Decomposition reaction
- Combination reaction between an element and a compound
- Direct combination reaction between two elements
- Displacement reaction
Formation of white precipitate on mixing sodium chloride solution and silver nitrate solution is an example of …………… reaction.
- Combination
- Decomposition
- Displacement
- Double decomposition
Which one of these is a chemical change?
- Water changes to steam
- Dissolution of sugar in water
- Combustion of LPG
- Liquefying ammonia
The reaction of neutralization is a :
- Displacement reaction
- Double decomposition
- Combination reaction
- Combination reaction between two compounds